Float-actuated pump valve



Z53 3%. a. F. ZfiLLHQEFER 193939056 FLOAT ACTUATED PUMP VALVE Filed July27, 1931 2 Sheets-Sheet l 3, 1933., a. F. ZELLHOEFER FLOAT ACTUATED PUMPVALVE Filed July 27, 1931 2 Sheets-Sheet 2 m fi IINVENTOR G1. E/V/VE zsuwa sz BY f armada f machines employ a pump 29 iment o thereof. Themounting hatented den. 3, 1933 PATENT OFFICE GLENN F. ZELLHOEFEB,

OF BLOOMINGTON, ILLINOIS, ASSIG'NOR TO "WILLIAMS OIL-O- LLA'IIG HEATINGCOBIQBA'I'ION, OF BLOOMING'ION, ILLINOIS, A CORPORATION 01' ELHIGIQFLOAT=ACTUATED PUMP VALVE This invention relates to improvements inpumps and more particularly to float operated valves therefor.

Some types of regenerative refrigerating actuated by the pressure of thegaseous refrigerant released from the solution in the still to trans ortthe solution from the solution tank to t e still, such as shown in thisapplicants rior application, Serial No. 4:73, 186, filed ugust 6, 1930,and it is to this type i pump this nvention relates. It is an ob]ect orthis invention to provide a simple and positive float operated mechanismfor actuating the valves for admitting and exhausting the gaseouspressure in a pump of this type.

With these and other ob ects in vlew, reference is made to theaccompanying sheets of drawin s which illustrate a preferred embodthisinvention with the understandchanges mayl he made t ing that minordetail ereof,

without departing from the scope In the-drawings; Figure 1 is a view invertical longitudinal 26 section through the pump casing of anembodiment of this invention, with some parts shown in side elevation.

Figure 2 is a view 1n transverse vertical section, taken on the line2-2, Figure 1, with w parts shown in side elevation.

Figure 3 is a fragmentary view in longitudinal horizontal section takenon the line 3--3, Figure 1, with parts in top plane view.

Figure 4 is a fragmentary View in trans- 35 verse vertical section takenon the lined-4,

Figure 1,

lhe embodiment of this invention lllustrated includes a casing 1 havinga screw threaded opening 2 in the bottom thereof with which is threadeda pipe 3 and a cover 4 having inlet and exhaust valves 5 and 6,respectively, and a depending mounting 7 for needle valve stems 8 and 9coacting with the valves 5 and 6 secured upon the inner side 7 inaddition to the guides 10 for the valve stems 8 and 9 is provided with adepending strap 11 providing bearings 12 for th free ends of a wish-honebracket 13 which is mounted upon and ex- W tends hem a float 14. Thebottom of the strap 11 is provided with a central upwardly extendingmember 15 provided with oppositely disposed conical bearing members 16in line with similar conical bearing extensions 1? from the bearings 12.

A spring engaging actuating member 18 is mounted for oscillation betweeneach pair of conical bearings 16-47 with parallel operating arms 19extending in both directions from each actuating member. One operatingarm 19 is mounted in line with the valve stems 8 and 9 and the bottom ofeach stem is cut out to embrace and be pivotally engaged with the arm 19therebelow. This arm 19 is extended beyond the stem 8 evidenced in avertical direction and terminates in two spaced apart fingers or stops20. T he other operating arm 19 is provided with a transverselyextending operating pin 21 adapted to travel, as the arm is oscillated,between the stops and upon further movement in engagement with a stop toimpart movement in the same direction to the valve stem operating arm19. The other end of the arm 19 carrying the operating pin 20 islikewise evidenced in a vertical direction and terminated in twosimilarly spaced apart fringes or stops 22. The side members 13 of thewish-bone bracket extending from the float 14 are joined by an operatingrod 23 which is adapted to travel, as the float rises and falls betweenthe stops 22 and upon further movement in engagement with a stop toimpart movement in the same direction to the operating arm.

The upper ends of each actuating member 18 is in pivotal engagement withthe lower end of a coil compression spring 24, the other end of whichengages an adjustable anchor mounted in the mounting 7 above eachrespective actuating member, so that-as the float rises, the bar 23engages the upper stop 22 imparting a rotation of the arm 19 causing theoperating pin 21 to travel downward until it engages the sprlng 24 isthrown oil center which imparts a quick positive downward movement tothe pin 21 whereby the evidenced end passes under the bar 23 until thelower stop 22 is brought with en gagement with the bar, and at the sametime the pin 21 travels with engagement with the -bar 23 being incontact with the lower stop.

22 causesthat arm 19 to rotate, the actuating member thereon to compressits s ring 24 Y and the pin 21 to move towards t e upper stop on theother arm 19. Then as the lower end of the spring 24 passes over 1tsdead center, it gives a kick to the actuating member causing the pin 21to engage the upper stop 20 to rotate the other arm 19 to pass the lowerend of its spring 24 to pass its dead center to kick over the valve stemcarrying arm 19, with the parts as shown in dotted lines in Figure 1, toclose the valve 5 and open the valve 6.

In this type of pump the pipe 3 is adapted to be connected to the bottomof the solution tank, not shown,-by a T joint leading to each with acheck valve in each handle allowing a flow of solution from the tank tothe pump and from the pump to the still. The valve 5 is adapted to beconnected to lead a portion of the gaseous refrigerant from the top .ofthe still therethrough. The valve 6 is adapted to be connected to leadthe gas under pressure trapped in the pump to the solut on tank.

When the float 14 is at its lowermost position, the valve '5 is closedand the valve 6 opens so that solution enters the casing 1 causing thefloat to rise to its uppermost position thereby opening valve 5 andclosing valve 6, whereupon pressure entering valve 5 faces the solutionfrom the casing 1 closing the check valve in the branch to the tank andpassing through the check valve into the still, and as the floatdescends, the valve 5 is closed and the valve 6 is opened allowing thesolution to again flow into the casing from the tank.

By this means the solution Wlll be intermittently and automaticallytransferred from the tank to the still. The buoyancy of the'float asthe, liquid level rises overcomes the tension of the springs 24, thenreleases them to cause a quick and positive opening of valve 5 andsimultaneous closing of valve 6. As the liquid level recedes, the weightof the float reverses the first action of the valve operatin mechanism.

. What claim is:

1 In a pump having a casing with an orifice for admitting and ischarginga-liquid, valves for admitting and discharging pressure, respectively,above the liquid in said casing, a float actuated means for opening onevalve and simultaneously closing the other including reciprocable valvestems mounted on a pivoted operating arm, a spring pressed. actuator onsaid arm, and means controlled by the position ofthe float (providedischargmeans controlled by the position of the float r to throw theactuator against its spring from one position to the other to 0 en onevalve and close the other valve, inc uding a pivoted float bracket, anadditional operating arm having a lost motion connection with saidbracket and with said valve stem operating arm.

3. In a pump having a casing provided with an orifice for admitting anddischarging a liquid, valves for admitting and dischar ing pressure,respectively, above the liquid in said casing, inlg one valve andsimultaneously closing the ot er including reciprocable valve stemsmounted on a pressed actuator on said arm, and means controlled by theposition of the float to throw the actuator against its spring from oneposition to the other to open one valve and close the other valve,including a pivoted float bracket, an additional operating arm having alost motion connection with said bracket and with said valve stemoperating arm, and a spring pressed actuator on said additional operatinarm. I

4. A oat operated mechanism for closing one valve and opening anothervalve, inolud- 2 a float actuated means for openpivoted operating arm, aspring ing a valve stem for each valve pivotallymounted upon a pivotedoperating arm on opposite sides of its pivotal point,.an actuatingmember carried on the operating arm'extending from its pivotal point, as ring engaging the actuator normally ho ding one valve closed and theother open, a float carrying bracket pivoted in line with the operatingarm pivot, and means pivoted in hne with the operating arm pivotinterposed between the bracket and the operating arm adapted at a.predetermined high and low position of the float to throw the operatingarm actuator.

5. A float operated mechanism for closing one valve and opening anothervalve, includ--- ing a valve stem for each valve pivotally mounted upona pivoted operating arm on I opposite sides of its pivotal point, anactuatmg member carried on the operating arm extending from its pivotalpoint, a spring engaging the actuator normally holding one valve closedandthe other open, a float carrying bracket pivoted in line with theoperating arm pivot, and means pivoted in line with the operating armpivot interposed between the Leee oee 3 bracket and the operating, armadapted at a gredetermined high and low position of the oat to throw theoperating arm actuator, said means including an arm having a lost motionconnection with the operating arm at one end and a lost motionconnection at the other side of its pivot with a float bracket with anactuating member carried thereon extending from its pivotal point, 10and a spring engaging the said actuator normally holding said arm withits lost motion connections at the respective ends of their travel,whereby movement of the float in the opposite direction first throws one15 actuator to cause the respective connections to move to the otherends of their travel and the contacts so made then throws the otheractuator whereupon the positions of the valve stems are reversed. 2oGLENN F. ZELLHOEFER.

